When Ash finally became the Kalos League Champion, Serena has finally decided to tell him how she feels. But the confession was cut short by a call from Professor Oak. The gang was told that a legendary Pokémon had escaped to another world- a world where Pokémon doesn't exist. Ash was given the mission to stop the legendary Pokémon from destruction and Serena was determined to go with him. They have to start the mission by going to an highschool in the other world called Pokémon High. Join Ash and Serena on their adventure in another world filled with laughter, drama, and of course- love!